I don't know for him but for me there are so many negatives it proved impossible to fish with. I fish very clear water and braid lowered my catch rate, no matter what "professional academic experts" say about that being impossible and bass being too stupid to notice. Worse for every bass I catch I get more hits from by catch like tarpon, snook or jacks. Braid has absolutely zero, ziltch, nada abrasion resistance forcing me to use at a minimum, 20# hard mono leader, many 40# if I'm using an expensive lure! More knots and no wonder knot has an exceptional record tying big thick mono to thin braid in the real world. Those thick knots with a hard mono tag end are murder going through your guides. My shorelines are solid marl rock full of exposed ancient coral and shell. Zebra Mussels coat most submerged structure. Braid just doesn't last a trip. Yeah I could wrench my drag down, lose all the salty fish, not enjoy the fight by dragging fish in like a flw/bass pro and not experience true fishing, but what fun is that? I could change my personal requirement of having reels last me a generation and let the braid ruin my gear with the drag wrenched to the max but I don't want to. I also need the stretch of mono as I fish treble hooked lures 99% of the time. My catch rate increases from the degree of forgiveness that compensates for my sometimes being too jealous in fighting a big fish.
None of these ideals or causes could affect anyone else in the world. Your right that its all personal preference. But what gets me is 99% of forum users tell folks your nuts for using anything but braid but know nothing about the conditions of which the person is fishing or what they want to get out of their fishing experience. Everyone thinks they have to fish like a pro and be equipped like a pro. Dragging a dink along the top of the waters surface isn't fishing, its imitating a t.v. personality. Nobody seems to have any idea how to really fight a fish let alone enjoy the battle. BPS isles now have a 4 foot section of none braided lines and 50 feet of double sided isle of nothing but braid. Less choice is always bad. The industry is thrilled that consumers buy braid at ever increasing prices. They are thrilled that it has negative effects on rods and reels when it is used the popular and improper way, they use that to get you to buy that next generation reel.